Try these PVC tiles
http://www.garageflooringllc.com/tuff-seal/ water will not seep through. As far as I am concerned the best solution on the market and not slippery. The downside its expensive but I had a price for having my garage tiled and it was a lot more then the PVC tiles.
Thanks for the kind words!
Hard Plastic Tiles
Hard plastic tiles such as Racedeck, Swisstrax, TrueLock and Sport Court all have a gap between each tile. Many if not all of the manufacturers will suggest you take them up once a year and clean under them. The other option is to use a ribbed tile and clean through them.
PVC Tiles
Quality PVC tiles such as TrueLock PVC, TrueLock Premier and Tuff Seal tiles do a better job of not allowing moisture to go through the tile -- in either direction.
The question becomes how watertight do you need your floor?
Many folks are not concerned about it. They simply do not have vehicles that leak and they clean up spills in a timely fashion. For those who are a little more concerned, a good PVC tile, although not watertight from a legal perspective, is more watertight than most people need to worry about.
From time to time we get someone with a wood substrate or a room below the garage where 100% watertight is of concern. In those cases Tuff Seal is the only product I know of that has a guaranteed watertight installation method.
The Downside of PVC
Everything has pluses and minuses. Since moisture can't go from the top down, if you have a slab with a moisture issue, some would argue that you run the risk of trapping that moisture. I have never seen mold or mildew below a PVC tile but its a fair point. PVC is also more likely to stain than a hard plastic tile, but using product like
Hilway Direct Plus or a top coat helps a lot.
Is it [Water] really an issue?
Most of the time its not. You will find people who only sell hard plastic tiles will find reasons to that their tile is the best way to deal with moisture. PVC people will tell you the same thing. We do both because every garage and every homeowner is different. Most, but not all of the time, these issues are perceived concerns that sales people capitalize on to make a sale. Sometimes there are real problems and they need addressed.